--- old/src/share/vm/services/memoryService.cpp	2015-11-19 15:35:30.402128456 +0100
+++ new/src/share/vm/services/memoryService.cpp	2015-11-19 15:35:30.278128460 +0100
@@ -32,6 +32,7 @@
 #include "gc/shared/genCollectedHeap.hpp"
 #include "gc/shared/generation.hpp"
 #include "gc/shared/generationSpec.hpp"
+#include "logging/logConfiguration.hpp"
 #include "memory/heap.hpp"
 #include "memory/memRegion.hpp"
 #include "oops/oop.inline.hpp"
@@ -517,8 +518,11 @@
 bool MemoryService::set_verbose(bool verbose) {
   MutexLocker m(Management_lock);
   // verbose will be set to the previous value
-  Flag::Error error = CommandLineFlags::boolAtPut("PrintGC", &verbose, Flag::MANAGEMENT);
-  assert(error==Flag::SUCCESS, "Setting PrintGC flag failed with error %s", Flag::flag_error_str(error));
+  if (verbose) {
+    LogConfiguration::parse_log_arguments("stdout", "gc", NULL, NULL, NULL);
+  } else {
+    LogConfiguration::parse_log_arguments("stdout", "gc=off", NULL, NULL, NULL);
+  }
   ClassLoadingService::reset_trace_class_unloading();
 
   return verbose;